/Engine/Source/Editor/UMGEditor/Public/UMGEditorModule.h
Get current customization extenders for widget
[TArrayView](API\Runtime\Core\Containers\TArrayView)< [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IBlueprintWidgetCustomizationExtender](API\Editor\UMGEditor\Customizations\IBlueprintWidgetCustomizationExt-) > > GetAllWidgetCustomizationExtenders()